[Haskell] Re: RFC: DData in hierarchical libraries

Simon Marlow simonmar at microsoft.com
Fri Mar 12 13:14:17 EST 2004

> Am Freitag, 12. März 2004 10:34 schrieb Simon Marlow:
> > [...]
> > Also, if the map argument comes first in 'insert map key 
> x', then partial
> > application is more likely to be useful (you're more likely 
> to be inserting
> > several things in the same map, rather than the same thing 
> in several maps).
> If you look at one concrete function, you probably use 
> insert, lookup etc. 
> several times with the same map argument and not with the 
> same key argument.  
> But IMO, this isn't a place where partial application is 
> typically used.

Don't want to drag this point out too much, but I just looked through the GHC sources and there are a few places where we do something like:

   map (lookupFM fm) [ ... ]


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